ES356477A1 - Apparatus for processing yarn - Google Patents

Abstract

In a ring spinning machine arcuate balloon limiters 70 extend over the full length of the traverse zone of the ring. Means are provided to thread anew end through the traveller 38 while the ring lies within the limiter 70. A servicing tender 50 as described in Specification 1,189,521 is provided to move to a station when a bobbin is full of the yarn running to the spindle is absent. When an empty bobbin has been donned and/or the supply of yarn reestablished a pusher 20 on the tender is actuated and moves towards the spindle, engages an anvil 76 on one edge of the gap between the adjoining ends of the limiter and displaces the edge to create a wider gap. In addition a vertically movable slide 94 carrying a bar 82 for engaging against an extension of the spindle rail and a movable fork 54 for threading the yarn on the traveller is moved downwardly from an inactive upper position until bar 82 engages the extension of the ring rail. Thereafter slide 84 moves with the ring rail. In this period fork 54 is operated to pass through the enlarged gap in the balloon limiter and thread the yarn to the traveller. Work 54 is then retracted, slide 94 moved to its upper inactive position and pusher 80 is retracted, the operations of the tender then being complete. As shown in Fig. 5 the inside of the limiter may be corrugated to reduce friction. The rings 40 are connected to the ring rail 22 by members 78 which pass through the vertical gay in the limiter 70. The limiter 70 may be in two hinged parts spring biassed into a closed position so that the gap may be more easily widened by the pusher 80. Alternatively it may be in two parts one of which is rotatable about the spindle axis and spring biassed towards a closed position again so that it will be easily displaced by pusher 80. In Figs. 10-13 not shown, when the tender (50) is located at a spindle position the ring is disconnected from the reciprocating members and lowered to a position below the limiter where the rethreading of the traveller is performed. In such an arrangement the traveller threading fork 54 does not need to be vertically movable. In Fig. 15 the doffing flange 200 which has an inflatable ring 204 to engage the top of a bobbin and remove it, is also provided with an inflatable ring 200 by which the top of the limiter 70 is grasped and removed, thus leaving the ring and traveller exposed for rethreading.